近距离煤层下层开采过集中煤柱矿压显现研究

The Research on the Appearance of Coal Pillar of Mine Pressure appened on Upper Layer of Close Seam due to Over-concentrated Exploration

大柳塔煤矿活鸡兔井存在近距离煤层开采情况,上下分层间距范围为6～20m,由于上分层开采留下部分集中煤柱,这些煤柱的存在为下分层的开采带来一定影响。本文利用理论分析、数值模拟和现场监测的方法,对集中煤柱的稳定性以及对下分层应力分布的影响进行了研究,为下分层开采的矿压控制提供了科学依据。

The exploration on the upper layer of close seam happened in the Huojitu pit of Daliuta Coal Mine.The distance of two seams ranges from 6 to 20 meters.As long as the exploration on the upper layer remains parts of the coal pillar of the lower layer,the coal pillar shall influence the exploration of the lower layer.The article,through theoretical analysis,data imitation and on-site supervision methods and the like researched the stress distribution of the lower layer and the stability of the concentrated coal pillar that helps to provide the scientific reference for the coal pressure controlling of the exploration of the lower layer.